The League of Women Voters of Sonoma County, the American Association of University Women-Petaluma Branch and the Petaluma Argus-Courier are sponsoring the event. It will run from 7 to 9 p.m. in the City Council chambers, 11 English St.

A final forum is scheduled for 7:30 p.m. Oct. 2 at a location to be determined. That event will include a discussion of Measure X, a parcel tax on the ballot to pay for parks and recreation facilities.